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Finding the Fourth Proportional to 219,367.78, 302,832.77 and 138,834.34

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Solution

The fourth proportional to 219,367.78, 302,832.77 and 138,834.34 is: 191,657.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,367.78 : 302,832.77 = 138,834.34 : x
  2. Step 2: Convert to fraction form
    219,367.78/302,832.77 = 138,834.34/x
  3. Step 3: Cross multiply
    219,367.78x = 302,832.77 × 138,834.34
  4. Step 4: Simplify right side
    219,367.78x = 42,043,588,129.96
  5. Step 5: Solve for x
    x = 42,043,588,129.96/219,367.78
  6. Step 6: Final answer
    x = 191,657.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.